Question about Sigma 18-200mm f/3.5-6.3 for Nikon

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Dust inside my sigma lens

I bought a sigma 18 - 200mm dc lens for nikon almost half year ago and found there is dust inside the lens. My warranty will valid untill April 21 2009. Do you think it should be covered by warranty? I have three Nikon compatibale lens and non of them has dust inside. I mean it is not possible to cause this problem by normal use, am I right?

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  • wj_xin Oct 03, 2008

    Thank you very much commedic, I contact sigma and also send a pic of the lens with dust inside to them. they ask me to send the lens to their service center. Yes, I am using the lens on my nikon d50 digital camera.

  • Anonymous Mar 26, 2014

    it is stuck up at 80, the lock will not go back to 18 so it seems impossible to use, please help

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Zoom lenses are kind of like a tire pump. They will draw air in (and out) when zoomed. The longer the throw of the zoom, the more air moved. You can try Sigma, they may cover it, but...

A small amount of dust should have no effect on the quality of your images, but I would be concerned about it being transferred to your camera's image sensor over time. ( I assume you are using the lens on a digital body )

Posted on Oct 02, 2008

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Is the sigma 18-200mm DC f3.5-6.3 compatable with nikon d50?


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  • 300mm EX DG
  • 500mm EX DG
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from here:  http://www.imaging-resource.com/NEWS/1177682545.html
Sorry for the bad news.  The cheaper thing at this point may be to sell the D40 and get a D80.  I personally have a D70S, but that is no longer made.  

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